This study investigates the question as to whether e-mail management training can alleviate the problem of time pressure linked to inadequate use of e-mail. A quasi-experiment was devised and carried out in an organizational setting to test the effect of an e-mail training program on four variables, e-mail self-efficacy, e-mail-specific time management, perceived time control over e-mail use, and estimated time spent in e-mail. With 175 subjects in the experimental group, and 105 subjects in the control group, data were collected before and after the experiment. ANCOVA analysis of the data demonstrated possible amount of time saving with an e-mail management training program. In addition, better perceived time control over e-mail use was observed. Since the change of e-mail-specific time management behavior was not significant, but e-mail self-efficacy improved substantially, it suggested that the major mediating process for better perceived time control over e-mail use and less estimated time spent in e-mail was through improved e-mail self-efficacy rather than a change of e-mail-specific time-management behavior.